有机流体成矿作用与古油藏成藏作用相互耦合——以右江盆地微细浸染型金矿为例

向才富; 庄新国; 陆友明; 李军虹

Volume 27 Issue 1

Jan. 2002

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Article Navigation > Earth Science > 2002 > 27(1): 35-39

XIANG Cai-fu, ZHUANG Xin-guo, LU You-ming, LI Jun-hong, 2002. Formation of Carlin-Type Gold Deposit by Hydrocarbon Fluid and its Correlation to Accumulation and Dispersion of Petroleum in Youjiang Basin, South China. Earth Science, 27(1): 35-39.

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Formation of Carlin-Type Gold Deposit by Hydrocarbon Fluid and its Correlation to Accumulation and Dispersion of Petroleum in Youjiang Basin, South China

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
The Marine Exploration Company of Shengli Oil Field, Dongying 257237, China
3.
The Document and Information Center, Chinese Academy of Sciences, Wuhan 430071, China

Received Date: 2000-10-26
Publish Date: 2002-01-25

Abstract

Abstract

The genesis of the Carlin-type gold deposits in the Youjiang basin, South China, has a close relationship with the evolution of the ancient oil reservoirs. Both Raman spectroscopy analysis of the fluid inclusions and gas chromatogram and mass spectrum analysis of the extractives from the ore indicate occurrences of abundant organic compounds. The gold deposits also have a consistent spatial distribution with the ancient oil reservoirs. Both of them occur in the core or on the flank of the Permian reef. According to the analyzed history of the Youjiang basin, the original fluid was formed during the rifting and early depression stage (> 172 Ma) of the basin. In the following approximately 40 Ma(172-130 Ma), there exists no strong tectonic movement in the Youjiang basin. It is available for the original fluid to migrate into the core or flank of the carbonate platform and other similar reservoirs. The original fluid turned gradually into ore-forming fluid during the migration. This process is also the migration of the hydrocarbon from the matured source rocks. The gold deposits were formed and the ancient oil reservoir was destroyed in Yenshan tectonic movement. It is the destroying of the ancient oil reservoir that caused the accumulation of the ore-forming elements to form the ore deposits. Based on the above facts, this paper proposed that the gold deposits and the ancient oil pools were products of the same fluid in its different stages of evolution.
- Carlin-type gold deposit,
- ore-forming fluid,
- oil and gas pool,
- Youjiang basin

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References(14)

References

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